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LibClang/Assist++ crashes with Clang 20 [message #61710]

Tue, 24 June 2025 23:03

Didier
Messages: 736
Registered: November 2008
Location: France

Contributor

Hello,

I update my computer to fedora 42 some time ago and I have Clang 20.
Since then assist++ crashes every time after a few seconds (I think it depends on which files I am working on).
So this is quite annoying Sad

This is what I get in the log:

* /home/xxxx/upp/theide 24.06.2025 22:42:01, user: xxxx

22:42:01:795 INFO  LoadLibClang0(): libclang path: "/usr/lib64/libclang.so.20.1.6"
22:42:01:799 INFO  GuiMainFn_(): Revision: e1e14c30 Build: 17914 master
64 bit CLANG C++17 SIMD Compiled: 06/06/2025 18:11:37 /home/xxxx/upp/theide
****************** PANIC: Illegal instruction!

I tried with different Assist++ standard : and the one that works best (ar at least that doesn't crash instantly Wink

) is C++23

Here is my Assist configuration:
index.php?t=getfile&id=7098&private=0

Attachment: Config_Assist.png
(Size: 100.97KB, Downloaded 124 times)

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Re: LibClang/Assist++ crashes with Clang 20 [message #61712 is a reply to message #61710]

Thu, 26 June 2025 09:39

mirek
Messages: 14266
Registered: November 2005

Ultimate Member

Didier wrote on Tue, 24 June 2025 23:03

Hello,

I update my computer to fedora 42 some time ago and I have Clang 20.
Since then assist++ crashes every time after a few seconds (I think it depends on which files I am working on).
So this is quite annoying

This is what I get in the log:
* /home/xxxx/upp/theide 24.06.2025 22:42:01, user: xxxx

22:42:01:795 INFO  LoadLibClang0(): libclang path: "/usr/lib64/libclang.so.20.1.6"
22:42:01:799 INFO  GuiMainFn_(): Revision: e1e14c30 Build: 17914 master
64 bit CLANG C++17 SIMD Compiled: 06/06/2025 18:11:37 /home/xxxx/upp/theide
****************** PANIC: Illegal instruction!
I tried with different Assist++ standard : and the one that works best (ar at least that doesn't crash instantly ) is C++23

Here is my Assist configuration:

Is it with git master head (nightly) or "release"?

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Re: LibClang/Assist++ crashes with Clang 20 [message #61713 is a reply to message #61712]

Thu, 26 June 2025 13:42

Didier
Messages: 736
Registered: November 2008
Location: France

Contributor

It' with the master :

GIT commit : ff0949a4a5934d5a8bc5a92d275c1e073c3317b9

Author: Mirek Fidler <[email]mirek.fidler@gmail.com[/email]>  2025-05-27 12:33:04
Committer: Mirek Fidler <[email]mirek.fidler@gmail.com[/email]>  2025-05-27 12:33:04
Parent: 522ccf5de056b44cec6840a10e571085ec53ba6a (Painter: Ellipse(Rect) fixed)
Child:  e1e14c308eb217d79c19d4cddcc6aaf8931553a2 (Merge branch 'master' of [url]https://github.com/ultimatepp/ultimatepp[/url])
Branches: master, remotes/origin/master
Follows: 2025.1
Precedes: 

    CodeEditor: compiler/linker problem workaround

Since it's one month old, I will update to latest version tonight and see if it's better

[Updated on: Thu, 26 June 2025 13:43]

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Re: LibClang/Assist++ crashes with Clang 20 [message #61714 is a reply to message #61713]

Sat, 28 June 2025 00:16

Didier
Messages: 736
Registered: November 2008
Location: France

Contributor

Hello Mirek,

I just tried with latest master version : same crash Confused

GIT : c0c5c293a9e104134854e6442f4c85647f9d9bfe

uthor: Mirek Fidler <mirek.fidler@gmail.com>  2025-06-27 09:47:27
Committer: Mirek Fidler <mirek.fidler@gmail.com>  2025-06-27 09:47:27
Parent: e471f7d0eba667d3cd5a9728a723e024b4740148 (RichEdit: DiagramEditor selection)
Child:  e98b68c34038b037c753afe8d794e45e171370b4 (Merge branch 'master' of https://github.com/ultimatepp/ultimatepp)
Branches: master, remotes/origin/master
Follows: 2025.1
Precedes: 

    RichEdit: Diagram

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Re: LibClang/Assist++ crashes with Clang 20 [message #61715 is a reply to message #61714]

Sat, 28 June 2025 08:56

mirek
Messages: 14266
Registered: November 2005

Ultimate Member

Didier wrote on Sat, 28 June 2025 00:16

Hello Mirek,

I just tried with latest master version : same crash Confused

GIT : c0c5c293a9e104134854e6442f4c85647f9d9bfe

uthor: Mirek Fidler <mirek.fidler@gmail.com>  2025-06-27 09:47:27
Committer: Mirek Fidler <mirek.fidler@gmail.com>  2025-06-27 09:47:27
Parent: e471f7d0eba667d3cd5a9728a723e024b4740148 (RichEdit: DiagramEditor selection)
Child:  e98b68c34038b037c753afe8d794e45e171370b4 (Merge branch 'master' of https://github.com/ultimatepp/ultimatepp)
Branches: master, remotes/origin/master
Follows: 2025.1
Precedes: 

    RichEdit: Diagram

- there should be "switch off assist after crash" dialog when you start theide next time. Does that work? (just curious here)
- any chance you can run it, compiled for debug, in gdb and send the backtrace after crash ("bt")

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Re: LibClang/Assist++ crashes with Clang 20 [message #61718 is a reply to message #61715]

Sun, 29 June 2025 11:29

Didier
Messages: 736
Registered: November 2008
Location: France

Contributor

Hello Mirek,

Quote:

there should be "switch off assist after crash" dialog when you start theide next time

Yes this works fine

Quote:

any chance you can run it, compiled for debug, in gdb and send the backtrace after crash ("bt")

Yes, I also included all the Backtrace detailed info (bt full) in the joined file so everything should be there

Note : the stacktrace was done by loading project 'ide' and launching "full source scan"